backend/tiff/tiff-document.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */
   2 /*
   3  * Copyright (C) 2005, Jonathan Blandford <jrb@gnome.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 /* FIXME: Should probably buffer calls to libtiff with TIFFSetWarningHandler
  21  */
  22
  23 #include "config.h"
  24
  25 #include <config.h>
  26 #include <stdio.h>
  27 #include <glib.h>
  28 #include <glib/gi18n-lib.h>
  29
  30 #include "tiffio.h"
  31 #include "tiff2ps.h"
  32 #include "tiff-document.h"
  33 #include "ev-document-misc.h"
  34 #include "ev-file-exporter.h"
  35 #include "ev-file-helpers.h"
  36
  37 struct _TiffDocumentClass
  38 {
  39   EvDocumentClass parent_class;
  40 };
  41
  42 struct _TiffDocument
  43 {
  44   EvDocument parent_instance;
  45
  46   TIFF *tiff;
  47   gint n_pages;
  48   TIFF2PSContext *ps_export_ctx;
  49
  50   gchar *uri;
  51 };
  52
  53 typedef struct _TiffDocumentClass TiffDocumentClass;
  54
  55 static void tiff_document_document_file_exporter_iface_init (EvFileExporterInterface *iface);
  56
  57 EV_BACKEND_REGISTER_WITH_CODE (TiffDocument, tiff_document,
  58                          {
  59                            EV_BACKEND_IMPLEMENT_INTERFACE (EV_TYPE_FILE_EXPORTER,
  60                                                            tiff_document_document_file_exporter_iface_init);
  61                          });
  62
  63 static TIFFErrorHandler orig_error_handler = NULL;
  64 static TIFFErrorHandler orig_warning_handler = NULL;
  65
  66 static void
  67 push_handlers (void)
  68 {
  69         orig_error_handler = TIFFSetErrorHandler (NULL);
  70         orig_warning_handler = TIFFSetWarningHandler (NULL);
  71 }
  72
  73 static void
  74 pop_handlers (void)
  75 {
  76         TIFFSetErrorHandler (orig_error_handler);
  77         TIFFSetWarningHandler (orig_warning_handler);
  78 }
  79
  80 static gboolean
  81 tiff_document_load (EvDocument  *document,
  82                     const char  *uri,
  83                     GError     **error)
  84 {
  85         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
  86         gchar *filename;
  87         TIFF *tiff;
  88
  89         filename = g_filename_from_uri (uri, NULL, error);
  90         if (!filename)
  91                 return FALSE;
  92
  93         push_handlers ();
  94         tiff = TIFFOpen (filename, "r");
  95         if (tiff) {
  96                 guint32 w, h;
  97
  98                 /* FIXME: unused data? why bother here */
  99                 TIFFGetField(tiff, TIFFTAG_IMAGEWIDTH, &w);
 100                 TIFFGetField(tiff, TIFFTAG_IMAGELENGTH, &h);
 101         }
 102
 103         if (!tiff) {
 104                 pop_handlers ();
 105
 106                 g_set_error_literal (error,
 107                                      EV_DOCUMENT_ERROR,
 108                                      EV_DOCUMENT_ERROR_INVALID,
 109                                      _("Invalid document"));
 110
 111                 g_free (filename);
 112                 return FALSE;
 113         }
 114
 115         tiff_document->tiff = tiff;
 116         g_free (tiff_document->uri);
 117         g_free (filename);
 118         tiff_document->uri = g_strdup (uri);
 119
 120         pop_handlers ();
 121         return TRUE;
 122 }
 123
 124 static gboolean
 125 tiff_document_save (EvDocument  *document,
 126                     const char  *uri,
 127                     GError     **error)
 128 {
 129         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
 130
 131         return ev_xfer_uri_simple (tiff_document->uri, uri, error);
 132 }
 133
 134 static int
 135 tiff_document_get_n_pages (EvDocument  *document)
 136 {
 137         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
 138
 139         g_return_val_if_fail (TIFF_IS_DOCUMENT (document), 0);
 140         g_return_val_if_fail (tiff_document->tiff != NULL, 0);
 141
 142         if (tiff_document->n_pages == -1) {
 143                 push_handlers ();
 144                 tiff_document->n_pages = 0;
 145
 146                 do {
 147                         tiff_document->n_pages ++;
 148                 }
 149                 while (TIFFReadDirectory (tiff_document->tiff));
 150                 pop_handlers ();
 151         }
 152
 153         return tiff_document->n_pages;
 154 }
 155
 156 static void
 157 tiff_document_get_resolution (TiffDocument *tiff_document,
 158                               gfloat       *x_res,
 159                               gfloat       *y_res)
 160 {
 161         gfloat x = 72.0, y = 72.0;
 162         gushort unit;
 163
 164         if (TIFFGetField (tiff_document->tiff, TIFFTAG_XRESOLUTION, &x) &&
 165             TIFFGetField (tiff_document->tiff, TIFFTAG_YRESOLUTION, &y)) {
 166                 if (TIFFGetFieldDefaulted (tiff_document->tiff, TIFFTAG_RESOLUTIONUNIT, &unit)) {
 167                         if (unit == RESUNIT_CENTIMETER) {
 168                                 x *= 2.54;
 169                                 y *= 2.54;
 170                         }
 171                 }
 172         }
 173
 174         *x_res = x;
 175         *y_res = y;
 176 }
 177
 178 static void
 179 tiff_document_get_page_size (EvDocument *document,
 180                              EvPage     *page,
 181                              double     *width,
 182                              double     *height)
 183 {
 184         guint32 w, h;
 185         gfloat x_res, y_res;
 186         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
 187
 188         g_return_if_fail (TIFF_IS_DOCUMENT (document));
 189         g_return_if_fail (tiff_document->tiff != NULL);
 190
 191         push_handlers ();
 192         if (TIFFSetDirectory (tiff_document->tiff, page->index) != 1) {
 193                 pop_handlers ();
 194                 return;
 195         }
 196
 197         TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &w);
 198         TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &h);
 199         tiff_document_get_resolution (tiff_document, &x_res, &y_res);
 200         h = h * (x_res / y_res);
 201
 202         *width = w;
 203         *height = h;
 204
 205         pop_handlers ();
 206 }
 207
 208 static cairo_surface_t *
 209 tiff_document_render (EvDocument      *document,
 210                       EvRenderContext *rc)
 211 {
 212         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
 213         int width, height;
 214         float x_res, y_res;
 215         gint rowstride, bytes;
 216         guchar *pixels = NULL;
 217         guchar *p;
 218         int orientation;
 219         cairo_surface_t *surface;
 220         cairo_surface_t *rotated_surface;
 221         static const cairo_user_data_key_t key;
 222
 223         g_return_val_if_fail (TIFF_IS_DOCUMENT (document), NULL);
 224         g_return_val_if_fail (tiff_document->tiff != NULL, NULL);
 225
 226         push_handlers ();
 227         if (TIFFSetDirectory (tiff_document->tiff, rc->page->index) != 1) {
 228                 pop_handlers ();
 229                 return NULL;
 230         }
 231
 232         if (!TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width)) {
 233                 pop_handlers ();
 234                 return NULL;
 235         }
 236
 237         if (! TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height)) {
 238                 pop_handlers ();
 239                 return NULL;
 240         }
 241
 242         if (! TIFFGetField (tiff_document->tiff, TIFFTAG_ORIENTATION, &orientation)) {
 243                 orientation = ORIENTATION_TOPLEFT;
 244         }
 245
 246         tiff_document_get_resolution (tiff_document, &x_res, &y_res);
 247
 248         pop_handlers ();
 249
 250         /* Sanity check the doc */
 251         if (width <= 0 || height <= 0)
 252                 return NULL;
 253
 254 #ifdef HAVE_CAIRO_FORMAT_STRIDE_FOR_WIDTH
 255         rowstride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
 256 #else
 257         rowstride = width * 4;
 258 #endif
 259         if (rowstride / 4 != width)
 260                 /* overflow, or cairo was changed in an unsupported way */
 261                 return NULL;
 262
 263         bytes = height * rowstride;
 264         if (bytes / rowstride != height)
 265                 /* overflow */
 266                 return NULL;
 267
 268         pixels = g_try_malloc (bytes);
 269         if (!pixels)
 270                 return NULL;
 271
 272         surface = cairo_image_surface_create_for_data (pixels,
 273                                                        CAIRO_FORMAT_RGB24,
 274                                                        width, height,
 275                                                        rowstride);
 276         cairo_surface_set_user_data (surface, &key,
 277                                      pixels, (cairo_destroy_func_t)g_free);
 278
 279         TIFFReadRGBAImageOriented (tiff_document->tiff,
 280                                    width, height,
 281                                    (uint32 *)pixels,
 282                                    orientation, 1);
 283         pop_handlers ();
 284
 285         /* Convert the format returned by libtiff to
 286         * what cairo expects
 287         */
 288         p = pixels;
 289         while (p < pixels + bytes) {
 290                 guint32 *pixel = (guint32*)p;
 291                 guint8 r = TIFFGetR(*pixel);
 292                 guint8 g = TIFFGetG(*pixel);
 293                 guint8 b = TIFFGetB(*pixel);
 294                 guint8 a = TIFFGetA(*pixel);
 295
 296                 *pixel = (a << 24) | (r << 16) | (g << 8) | b;
 297
 298                 p += 4;
 299         }
 300
 301         rotated_surface = ev_document_misc_surface_rotate_and_scale (surface,
 302                                                                      (width * rc->scale) + 0.5,
 303                                                                      (height * rc->scale * (x_res / y_res)) + 0.5,
 304                                                                      rc->rotation);
 305         cairo_surface_destroy (surface);
 306
 307         return rotated_surface;
 308 }
 309
 310 static GdkPixbuf *
 311 tiff_document_get_thumbnail (EvDocument      *document,
 312                              EvRenderContext *rc)
 313 {
 314         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
 315         int width, height;
 316         float x_res, y_res;
 317         gint rowstride, bytes;
 318         guchar *pixels = NULL;
 319         GdkPixbuf *pixbuf;
 320         GdkPixbuf *scaled_pixbuf;
 321         GdkPixbuf *rotated_pixbuf;
 322
 323         push_handlers ();
 324         if (TIFFSetDirectory (tiff_document->tiff, rc->page->index) != 1) {
 325                 pop_handlers ();
 326                 return NULL;
 327         }
 328
 329         if (!TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGEWIDTH, &width)) {
 330                 pop_handlers ();
 331                 return NULL;
 332         }
 333
 334         if (! TIFFGetField (tiff_document->tiff, TIFFTAG_IMAGELENGTH, &height)) {
 335                 pop_handlers ();
 336                 return NULL;
 337         }
 338
 339         tiff_document_get_resolution (tiff_document, &x_res, &y_res);
 340
 341         pop_handlers ();
 342
 343         /* Sanity check the doc */
 344         if (width <= 0 || height <= 0)
 345                 return NULL;
 346
 347         rowstride = width * 4;
 348         if (rowstride / 4 != width)
 349                 /* overflow */
 350                 return NULL;
 351
 352         bytes = height * rowstride;
 353         if (bytes / rowstride != height)
 354                 /* overflow */
 355                 return NULL;
 356
 357         pixels = g_try_malloc (bytes);
 358         if (!pixels)
 359                 return NULL;
 360
 361         pixbuf = gdk_pixbuf_new_from_data (pixels, GDK_COLORSPACE_RGB, TRUE, 8,
 362                                            width, height, rowstride,
 363                                            (GdkPixbufDestroyNotify) g_free, NULL);
 364         TIFFReadRGBAImageOriented (tiff_document->tiff,
 365                                    width, height,
 366                                    (uint32 *)pixels,
 367                                    ORIENTATION_TOPLEFT, 1);
 368         pop_handlers ();
 369
 370         scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf,
 371                                                  width * rc->scale,
 372                                                  height * rc->scale * (x_res / y_res),
 373                                                  GDK_INTERP_BILINEAR);
 374         g_object_unref (pixbuf);
 375
 376         rotated_pixbuf = gdk_pixbuf_rotate_simple (scaled_pixbuf, 360 - rc->rotation);
 377         g_object_unref (scaled_pixbuf);
 378
 379         return rotated_pixbuf;
 380 }
 381
 382 static gchar *
 383 tiff_document_get_page_label (EvDocument *document,
 384                               EvPage     *page)
 385 {
 386         TiffDocument *tiff_document = TIFF_DOCUMENT (document);
 387         static gchar *label;
 388
 389         if (TIFFGetField (tiff_document->tiff, TIFFTAG_PAGENAME, &label) &&
 390             g_utf8_validate (label, -1, NULL)) {
 391                 return g_strdup (label);
 392         }
 393
 394         return NULL;
 395 }
 396
 397 static void
 398 tiff_document_finalize (GObject *object)
 399 {
 400         TiffDocument *tiff_document = TIFF_DOCUMENT (object);
 401
 402         if (tiff_document->tiff)
 403                 TIFFClose (tiff_document->tiff);
 404         if (tiff_document->uri)
 405                 g_free (tiff_document->uri);
 406
 407         G_OBJECT_CLASS (tiff_document_parent_class)->finalize (object);
 408 }
 409
 410 static void
 411 tiff_document_class_init (TiffDocumentClass *klass)
 412 {
 413         GObjectClass    *gobject_class = G_OBJECT_CLASS (klass);
 414         EvDocumentClass *ev_document_class = EV_DOCUMENT_CLASS (klass);
 415
 416         gobject_class->finalize = tiff_document_finalize;
 417
 418         ev_document_class->load = tiff_document_load;
 419         ev_document_class->save = tiff_document_save;
 420         ev_document_class->get_n_pages = tiff_document_get_n_pages;
 421         ev_document_class->get_page_size = tiff_document_get_page_size;
 422         ev_document_class->render = tiff_document_render;
 423         ev_document_class->get_thumbnail = tiff_document_get_thumbnail;
 424         ev_document_class->get_page_label = tiff_document_get_page_label;
 425 }
 426
 427 /* postscript exporter implementation */
 428 static void
 429 tiff_document_file_exporter_begin (EvFileExporter        *exporter,
 430                                    EvFileExporterContext *fc)
 431 {
 432         TiffDocument *document = TIFF_DOCUMENT (exporter);
 433
 434         document->ps_export_ctx = tiff2ps_context_new(fc->filename);
 435 }
 436
 437 static void
 438 tiff_document_file_exporter_do_page (EvFileExporter *exporter, EvRenderContext *rc)
 439 {
 440         TiffDocument *document = TIFF_DOCUMENT (exporter);
 441
 442         if (document->ps_export_ctx == NULL)
 443                 return;
 444         if (TIFFSetDirectory (document->tiff, rc->page->index) != 1)
 445                 return;
 446         tiff2ps_process_page (document->ps_export_ctx, document->tiff,
 447                               0, 0, 0, 0, 0);
 448 }
 449
 450 static void
 451 tiff_document_file_exporter_end (EvFileExporter *exporter)
 452 {
 453         TiffDocument *document = TIFF_DOCUMENT (exporter);
 454
 455         if (document->ps_export_ctx == NULL)
 456                 return;
 457         tiff2ps_context_finalize(document->ps_export_ctx);
 458 }
 459
 460 static EvFileExporterCapabilities
 461 tiff_document_file_exporter_get_capabilities (EvFileExporter *exporter)
 462 {
 463         return  EV_FILE_EXPORTER_CAN_PAGE_SET |
 464                 EV_FILE_EXPORTER_CAN_COPIES |
 465                 EV_FILE_EXPORTER_CAN_COLLATE |
 466                 EV_FILE_EXPORTER_CAN_REVERSE |
 467                 EV_FILE_EXPORTER_CAN_GENERATE_PS;
 468 }
 469
 470 static void
 471 tiff_document_document_file_exporter_iface_init (EvFileExporterInterface *iface)
 472 {
 473         iface->begin = tiff_document_file_exporter_begin;
 474         iface->do_page = tiff_document_file_exporter_do_page;
 475         iface->end = tiff_document_file_exporter_end;
 476         iface->get_capabilities = tiff_document_file_exporter_get_capabilities;
 477 }
 478
 479 static void
 480 tiff_document_init (TiffDocument *tiff_document)
 481 {
 482         tiff_document->n_pages = -1;
 483 }